Nets and Surface Area

Nets and Surface Area

MAFS.6.G.1.4

Objective

• Recognize that surfaces of some three-dimensional (3-D) shapes ate composed of two-dimensional (2-D) faces or polygons

• Use a net to represent a 3-D figure (polyhedron)

• Use a net to dins the surface area of a polyhedron made up of rectangles and triangles

Vocabulary

• Base: the face of a geometric figure from which the height can be measured

• net: a flat "unfolded" representation of a prism or pyramid

• surface area: the sum of all areas of the faces of a figure

• triangular pyramid: a 3-D figure that has two parallel triangular faces that are the same size and shape

• pyramid: a 3-D figure whose base is a polygon and whose other faces are triangles.

First Let's Review

What do we remember about area?

Multiple Choice

Area is...

• the same inside of an object

• the space around an object

Multiple Choice

What is the formula for the area of a parallelogram?

• $A=\frac{bh}{2}$

• $A=bh$

• $A=\frac{1}{2}bh$

Multiple Select

What is the formula for the area of a triangle? select all that apply

•  $A=\frac{bh}{2}$  
  

•  $A=bh$  
  

•  $A=\frac{1}{2}bh$  
  

•  $A=\frac{b}{h}$   

Fill in the Blank

Find the area. Write the number only.

Fill in the Blank

Find the area. Write the number only

Multiple Choice

Which number is NOT needed to solve the problem?

• 10 in

• 8 in

• 1 ft

• all numbers are needed

Fill in the Blank

Find the area. Write the number only

Fill in the Blank

How many faces does the 3-D figure have?

Different 3-D shapes and their nets